Scale remover



P. VON ARX SCALE REMOVER March 23, 1954 2 Sheets-Sheet 1 Filed Oct. 26, 1951 Fig.1

in van tar:

March 23, 1954 p VON A 2,672,677

SCALE REMOVER Filed Oct. 26, 1951 2 Sheets-Sheet 2 v n "Ire r Paul v0, 9,

Patented Mar. 23, 1954 OFFICE SCALE REMOVER Paul von Arx, Sissach Switzerland, assignor to P. von Arx & Co. A. G., Sissach, Switzerland Application October 26, 1951 Serial No. 253,287

Claims priority,

application Switzerland November 1, 1950 4 Claims. (01. 29 s1 My invention has for its object an arrangement for removing rust from metal bodies through mechanical action on the rusted parts. rangement is characte tion and cooperating withahammer reciprocating under the action of suitable control means, said hammer acting on the different pins through the agency of damping means in a manner being set with the tips of surface.

Fig. 1 is a vertical section through the head portion of the arrangement according to a first embodiment of the invention;

Fig. 2 shows a structural modification of this arrangement;

Fig. 3 is a side view of the head portion of the arrangement according to a further embodiment;

Figs. 4 and 5 are a side and a front view of a c forations adapted to receive slidingly corresponding pins I2 provided each with a head at the inner end thereof. These pins I 2 are guided in the perforations of the guiding plate II and they are thus carried in the latter in a manner such that the bundle constituted by the pins considered as a whole, is slightly conical and converges towards a point beyond the outlet of the casing. The heads of the pins I2 carry a rubber cushion I3 forming damping means and said cushion is also adapted to slide inside the casing Ill. The guiding plate II is submitted to the tr'actional action of springs I4 inserted between the pivots II a and corresponding laterally projecting studs on the casing I0 whereby the pins I2 are urged the pins engaging the said metal rearwardly so that their heads bear against the rubber cushion which is held in its turn in contact with the plate-shaped head of a hammer I5 id n y carried inside the casing it. This hammer I 5 is connected with control means of a suitable type adapted to shift the hammer in either direction after the manner of a pneumatic hammer. These control means may be pneumatic as in the case of a pneumatic hammer or else they may be of an electric type. As these control means are known per se, and correspond, as concerns the present arrangement, only to an application of means that are known per se, it is unnecessary to illustrate and describe such with further detail.

During operation of the arrangement, the hammer it executes, as already stated, a reciprocatory movement. The arrangement itself is caused to rest on the portion of a pipe, beam or the like metal body that is to be freed of rust, preferably through application of a slight pressure so that the pins I2 engage said portion of the metal body. The hammer will then strike in quick succession the pins I2 the rear ends of which engage elastically the rubber cushion I3 and the blows thus executed are transmitted through the pins: I2 to the metal body in the shape of a vibratory percussion, whereby any rust flakes appearing on the corresponding points of the metal body are hammered 01f.

Fig. 2 shows the head portion I6 of a similar arrangement wherein, however, the actual pins Isa assume different lengths so that they may readily engage corners. As apparent, these pins assume greater lengths as they are considered nearer one end of the bundle of pins.

In the arrangement according to Fig. 3, the pins I 1 are guided through the perforations of a guiding plate I8 that is carried in its turn slidingly over rods I9 providing a rigid connection between the upper and lower stationary carrier plates 20 and 2I. The pins I! pass also through the lower stationary carrier plate 2| and are surrounded by helical springs 22 bearing through one end against the said carrier plate 2| while their other ends are anchored in the peripheral grooves of the pins I'I. Thus, the heads of the pins H are urged into engagement with the upper surface of the upper plate I8. On the other hand, the rods I9 are each surrounded by a strong compression spring 23 inserted between the movable guiding plate It and the loweri stationary plate 2|, said springs 23 urging the guiding plate i8 upwardly into engagement against the lower part of the hammer 24 that reciprocates again, as precedingly, under the action of suitable control means. The pins I! are thereby urged downwardly and individually by their own springs 22, while the arrangement of pins considered as a whole is urged upwardly by the springs 23. The latter are sized in a manner such that they exert together a more considerable action than the springs 22 considered together so that the guiding plate 18 is actually urged, as precedingly, into engagement with the hammer 24. The operation of this arrangement is similar to that of the arrangement according to Fig. l inasmuch as vibratory blows are transmitted by the hammer 24 to the metal body through the agency of pins submitted to the action of elastic means, and

consequently the metal body may be freed of its rust deposit through this hammering.

In the embodiment illustrated in Figs. 4 and 5, there is a double bundle of pins 25 and 25, each bundle being held by an interchangeable auxiliary rubber pad 21, said pad holding the corresponding pins through the side of their heads that faces their tips and forming a substitute for the rigid guiding members such as the plate ll shown in the embodiment The main rubber cushion 28 is arranged to the rear of the pin heads in the manner already disclosed hereinabove, and it may include, for furthering its reciprocation inside the casing 29, an intermediary disc of metal 30 the periphery of which matches the inner surface of the casing.

A common handle 3! may carry a plurality of different scale and dust removing bundles of the type just described; the two bundles carried by the handle 3| in the case of Fig. l are in alignment with reference to each other and they extend preferably in two orthogonal directions e. g. in a plane perpendicular to the handle axis and in a plane passing through same respectively. This allows using, as required, either of the pin bundles according to requirements, the same control means and hammer being obviously resorted to in both cases. All the above described arrangements could also be used for treating (cleaning) stone surfaces.

illustrated in Fig. 1.-

WhatIclaimis:

1. A tool for cleaning metal and stone surfaces, comprising a casing, a bundle of pins having tips adapted to engage the surface to be cleaned, an enlarged head on each said pin, a guiding member holding the different pins, elastic means biassing the guiding member and the pins into a retracted position with respect to the location of the surface, a hammer adapted to reciprocate with respect to the heads of the pins to impart thereto a rhythmic movement towards the surface, said movement producing a vibratory action on the surface, damping means associated with the pins for damping the action of the hammer on the pins, said casing extending in proximity to the ends of said pins and forming therearound a guiding skirt for preventing bending of the pins,

2. A tool as claimed in claim 1, said guiding member comprising a plate having perforations slidingly carrying said pins in corresponding perforations.

3. A tool as claimed in claim 1, said damping means comprising a resilient cushion fitted between the hammer and the heads of the pins.

4. A tool as claimed in claim 1, said casing being tubular and having longitudinally extending grooves therein, pivots carried by said plate and 'slidably engaging in said grooves, springs urging said pivots rearwardly with respect to the surface and constituting said elastic means.

PAUL VON ARX.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,004,617 Archer 1 Oct. 3, 1911 2,136,595 Rogers Nov. 15', 1938 2,356,314 Gray et al. Aug. 22, 1944 ,OTHER REFERENCES Wise: (Abstract) filed April21, 1948. Published August 15, 1950, vol. 637, O. (3., page 957, l sht. dwg., 5 pp. of specification. 

